Dry-dusting machine



Feb. 20, 1923. 1,445,849;

I. r A. c. SARGENT.

DRY DUSTING MAGHWE FILED APR. 6. 1921.

IN V EN TOR. A. C. SARGENT.

Patented Feb. Hill,

i of Fig. 1

. srar ALLANG. SARGENT, 011" WElBTFUZdD. MASSACHUSETTS, ASSIGNQE TO 0. Gr. SARGENWS SONS CORPORATION, A CORYPORATION Q1" l'dASSACHUfiETIS.

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T (ZZZ whom may concern.

Be it known that I, ALLAN (l. tininoice'ir,

the followingis a specification.

This invention relates to aYinae-hil'ie for removing the dust from fibrous material. It can be made in such form andsize as to be suitable for drydustingl sl'iestos or, if inz'inufactnred on a larger scale-the same principle can be applied to the dusting of wool. The principal.object of the invention is to combine witha rotary dustinnscreen, an etfectiveand simple means for the auto matic renioval of accumulated dirt at the bottom in a convenient manner.

Further objects and advantages of the invention will appear-hereinafter.

Reference to be had to the accompanyingz drawings in which c Fig. 1. is a side elevationjo-f a dry duster constructed according to thisinvention and suitable for operation on asbestos or wool;

Fig. 2 is an end view of the same a Fig. 3 isa sectional view on the line 3-3 Fig. is an elevation partly broken away to show the interior construction of a. modi- .fication;

Fig. 5 is an end view of the saine; and M Fig. 6 is a sectional. end view on the line 6-6 of Fig. 4%. p

i In both of the forms shown. the machine embodies a casing 10 in which are located a pair of parallel shafts 11 preferably arranged at an inclination. These are driven by adriving shaft 12 having a driving; pulley, 13 at one end. The connection between the shaft 12 and the shafts 11 is shown as made by means of bevel. gears 14-.

These shafts 11 are provided with a plurality of wheels 15 on which restrings 16 that surround a cylindrical screen 17. The two wheels 15 of each pair are so located as to support this screen and rotate it as the shafts 11 are rotated.

Inside the cylinder are a plurality of wooden lags 19 extending longitudinally and these are provided with long teeth projecting forwardly in the general direction of rotation but sticking out somewhat toward the center. i

The fiber to be dusted is introducedin. 2.

Application filed April 6,

. ing with a. gear 1921. Serial I To. 459,031.

The cylinder 17 as stated is a screen preferably niade of coarse mesh screen cloth. Means is usually provided for drawing out the light dust by a fan (not shown) or by a current of air inducedin any desired way. However; the heavy particles sift through the rotating cylimlerand would be deposited on the bottom of the casing 10. In order to avoid the necessity o removing theseheavy droppings by ieinov 5; he side panels of the casing and. pulling them out, the following mechanism is provided:

On the shaft 12 there is alp ear 22 mesh- 7 23 on a parallel shaft as. On this parallel. sl, aft is located a sprocket wheel 21 on which an endless apron mounted and by which it is driven. This apron also passes over a sprocket wheel 26 on a shaft 27 at the other end of the casing. The shaft 27 is located at a lower level than the shaft 24 and preferably the line connecting them is parallel with the axis of the cylinderl'Z.

l[ have shown also a pair of inclined. walls under the cylinder converging toward each other on which a considerable part of the heavy droppings are deposited and. down same in a hopper 28 at the receiving end of the duster. This provides for contin uous cleaning under practically all circumstances and does away with the difficulty of cleaning out the bottom of the casing above-mentioned.

It will be understood of course, that a special feeder can be employed for introducing material into the duster and any desired. means for taking it away from the dorm lower end but those do not constitute a part of this invention.

The description of the cylinder 17 and casing 10 and means for driving and supporting the wheels applies equally to the form shown in Figs. 1-, 5 and 6 but in that form the inclined walls 30 are more essen tial than they are in the other and they have at the bottom of them cylindrical passage 31 located at an inclination as in the other case and having Within it ascrew eonveyor 32. This is shown as provided with a worm Wheel 33 operated by a worm 3% on. the shaft 12 but, of course any othezonvenient means of operation can be provided Within the scope of this invention.

Although I have illustrated and described only two forms oi? the invention I am aware of the fact that ther modifications can be made therein by any person skilled in the art Without departing from the scope of the invention as expressed in the claims.

Therefore I do not wish to be limited to all the details oi construction herein shown and described but What I do claim is 1. In a dry duster, the combination or a screen cylinder rotatably supported, a pair of Walls under the screen slanting toward the center thereof for receiving dust and dirt through the screen and discharging it by gravity at the point where the walls converge at the bottom, a series of pairs of Wheels located below but projecting through said walls for supporting said cylinder means for positively rotating said Wheels, a conveyor located in position to r ceive the discharge down said walls, and means connected with said wheels for operating; the conveyor when the cylinder rotates to T6111 ve the discharge at one end oi the casing.

2. In a dry duster the combination ot a easing a pair oi parallel shafts thereiin Wheels on said shafts, a transverse power shaft, means for rotating said shafts in the 

